Geant4 is a general purpose toolkit for the simulation of the passage of particles through matter. Primary focus of Geant4 was on preparation of experiments for CERN Large Hadron Collider. Other areas of application are growing and include high energy, nuclear and accelerator physics, studies in hadronic therapy, tomography, space dosimetry, and others. Geant4 physics includes different models for simulation of interactions of hadrons with nuclei.
The present web page contains nuclear data for the high precision transport model (G4NeutronHP/G4ParticleHP) of neutrons with energies lower than 20 MeV. These data come from different releases of the evaluated data libraries (e.g. ENDF/B-VII.1, JEFF-3.3, JENDL-4.0, etc), which have been converted into the Geant4 format. Such data are meant to replace the default G4NDL neutron library available with the standard Geant4 distribution. In this way, Geant4 users will have access to the complete list of standard evaluated neutron data libraries when performing Monte Carlo simulations with Geant4, have access to a larger list of isotopes and be able to estimate the systematic uncertainties in the results associated to the uncertainties in nuclear data.
Information concerning the conversion process and verification tests can be found in:
These data libraries work on Geant4 releases newer than Geant4.9.5.p02.
The procedure for installing the libraries is described as follows:
$unix> tar -xjvf JEFF-3.3.tar.bz
$unix>cp -r [...]/G4NDL4.5/IsotopeProduction [...]/JEFF-3.3/IsotopeProduction
$unix>cp -r [...]/G4NDL4.5/JENDL_HE [...]/JEFF-3.3/JENDL_HE
$unix>cp -r [...]/G4NDL4.5/ThermalScattering [...]/JEFF-3.3/ThermalScattering
$unix>cp -r [...]/G4NDL4.5/Inelastic/Gammas [...]/JEFF-3.3/Inelastic/Gammas
Neutron data libraries in the G4NDL format for the different evaluated nuclear data libraries:
Figures containing energy distributions obtained from Geant4 and MCNP6 simulations of the secondary neutrons, γ-rays, p, d, t, 3He and α as described in INDC(NDS)-0758:
Download all the compressed figures as G4_10.04.p01_VS_MCNP6_pdfFiles.tar.gz.
Figures for every distribution (partial cross sections, energy and angular distributions of secondaries...) sampled with the Geant4 classes and generated the "viewr" program of NJOY code. The figures have been compiled in postscript and there exists one for each isotope in each library processed:.
This work was partly supported by the European project ENSAR2 (Grant agreement ID: 654002).
The authors would appreciate that their work is acknowledged properly. Please cite: